Foxtrot Mike Products Ultra Light Free Float AR-15 Handguard - M-LOK - Gen 2 - 15"

Manufactured by Foxtrot Mike Products
SKU: FM-5.56-15ULHG
MPN: FM-5.56-15ULHG
Manufactured by Foxtrot Mike Products
12 Reviews

In Stock

Standard orders will ship out in 1 business day (M-F) if ordered by 3:30 pm CST. FFL orders will ship within 5 business days or less as long as we have the information for the transfer destination. NFA items will take longer to ship and are dependent upon ATF processing times.

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Free float handguards offer many improvements to the standard two-piece Mil-Spec AR-15 handguards. They reduce pressure on the muzzle end of the barrel which increases accuracy, offer more customization in terms of accessory mounting options, and come in many different lengths and profiles. The Foxtrot Mike Products FM-9 Ultra Light handguard features a slim profile with M-LOK attachment points along the full 15” in length. It is machined from 6061-T6 aluminum and has a type III hardcoat anodized finish for excellent corrosion resistance. This AR-15 free float handguard is compatible with all Mil-Spec upper receivers and most low-profile gas blocks, so you have the freedom to build your rifle the way that you want. It is easy to install with the included proprietary barrel nut and eight hardened steel screws to ensure that it won’t loosen over time. This M-LOK handguard also has a full length picatinny top rail that mounts flush with M4 flat top upper receivers to give you more mounting space for scopes, red dots and iron sights. If you are looking to upgrade your current rifle or build a new one, you can’t go wrong with this FM products AR-15 handguard.

  • M-LOK compatible at 3, 6, and 9 o’clock positions for lights, grips, bipods, and other accessories
  • Single piece free float design that is lightweight and durable
  • Machined from 6061-T6 aluminum
  • Mil-Spec hardcoat anodized black
  • Light and slim profile for increased ergonomics and comfort
  • Includes proprietary barrel nut
  • Full length picatinny top rail
  • Barrel nut requires 1 3/16 wrench (30 MM)
  • Made in the U.S.A.

Feature rich, high-quality, and affordable, Foxtrot Mike Products offer cutting edge solutions utilizing the highest quality materials and manufacturing processes available.
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Accessory AttachmentM-LOK
BrandFoxtrot Mike Products
FinishHardcoat Anodized
Gas System LengthExtended Rifle
Handguard Length15
MaterialAluminum - 6061-T6
Weight11.6 oz.
California Prop 65 warning

 WARNING: This product can expose you to chemicals, which are known to the State of California to cause Cancer and Reproductive Harm. For more information go to

Ratings & Reviews

12 reviews


Great quality


I love how it saves weight and still keep the full Picatinny rail

Great product so far

by -

Pretty pleased with this handguard for the price. Keep in mind it's a "slim" handguard so a full size flash can or linear comp will likely not fit under it, but the "slim" versions will. At 11.6oz it's the lightest 15" aluminum handguard i have come across. I did not have any issue indexing the barrel nut appropriately on a BCA barrel and upper, no shims were used.

Great for PCC builds!

by -

I was very surprised with the quality and fit of this handguard at this priceI highly recommend it for PCC builds.

What a deal!

by -

Lightweight and great quality! Strong and straight. For what I paid for it, I made out like a bandit. Would buy again.

Good product and price

by -

Great service and speedy shipping from PA as usual. Hand guard appears good quality and install was fairly easy- I did need a few of the shims. I like e 15" length- both looks and utility and the MLok slots are great. Wish the guards had anti-rotation tabs, but that's my only complaint. I would recommend to others.

Great Buy

by -

Surprisingly good quality for the price paid. The barrel nut was a bit of a pain due to the odd size compared to the tooling I had on hand but not that big of a deal. Fit was really good, handguard feels good in the hand as well. Already thinking about buying another one.

Installed in less than 20mins

by -

Got it and installed it onto my 16” barrel windham weaponry AR15 within 20mins... looks good and feel amazing. I would say the longest part of the install was barrel but alignment. But other than that I can’t wait to use it

Missing barrel nut shims

by -

Low rating because part arrived without shims. You may want to check before ordering if this is a problem with all or just this one. Primary has offered to RMA and their service is the best as always. Will update if I can install without shims.

From PA: The barrel nut on this item was updated and no longer needs shims.

Barrel wahsers missing, but able to install and looks nice

by -

I have upgraded the original review. Fit was tight, barrel nut needed a bit of persuasion to come out of rail as received but in the end it fit well and looks really good. I would have liked to have rated a 5 but the missing spacers was a disappointment.

Bolts too small for barrel nut threads.

by -

Product looks and feels great, however, the 8 bolts that came with my Handguard are too small to catch the threads on the barrel nut. Not PA’s fault, but I had problems with my first Handguard (not this product) they were quick on helping me get that issue resolved, but 2 problems with 2 different products. This time I emailed the actual company to help resolve this issue.